CN108386357B - Liquid impact preventing device of single screw compressor - Google Patents
Liquid impact preventing device of single screw compressor Download PDFInfo
- Publication number
- CN108386357B CN108386357B CN201810351013.1A CN201810351013A CN108386357B CN 108386357 B CN108386357 B CN 108386357B CN 201810351013 A CN201810351013 A CN 201810351013A CN 108386357 B CN108386357 B CN 108386357B
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- pressure
- pore
- piston valve
- oil
- compressor
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- 239000007788 liquid Substances 0.000 title claims abstract description 22
- 239000011148 porous material Substances 0.000 claims description 99
- 238000006073 displacement reaction Methods 0.000 claims description 14
- 230000005484 gravity Effects 0.000 claims description 5
- 230000005465 channeling Effects 0.000 claims description 4
- 230000002265 prevention Effects 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims description 2
- 238000002347 injection Methods 0.000 abstract description 3
- 239000007924 injection Substances 0.000 abstract description 3
- 239000003921 oil Substances 0.000 description 63
- 238000010586 diagram Methods 0.000 description 2
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
- F04C18/08—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
- F04C18/10—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth equivalents, e.g. rollers, than the inner member
- F04C18/107—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth equivalents, e.g. rollers, than the inner member with helical teeth
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
- F04C29/02—Lubrication; Lubricant separation
- F04C29/021—Control systems for the circulation of the lubricant
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
Abstract
A liquid impact preventing device of a single screw compressor belongs to the technical field of compressors. The device comprises a piston baffle, a screw, an oil way on-off device, a piston valve and a spring. The positions of the piston valve 5 and the oil way on-off device are controlled simultaneously through the pressure difference, so that on-off between the oil pools of the low-pressure cavity and the high-pressure cavity is realized. The piston valve and the spring are added, so that the running reliability of the liquid impact preventing device is improved, and the liquid impact problem of the oil injection single screw compressor is effectively solved.
Description
Technical Field
The invention relates to an oil injection single-screw compressor device, in particular to a liquid impact prevention device of a single-screw compressor, and belongs to the technical field of compressors.
Background
After the single screw compressor is stopped, because the high pressure cavity has residual pressure, lubricating oil pressure can be increased to the low pressure side, and the liquid can be drilled into the spiral groove, and when the compressor is restarted, the liquid is sealed by the star wheel sheet and pushed to the exhaust hole, and if the liquid in the tooth groove is more, when the liquid is not communicated with the exhaust hole, the phenomenon of liquid impact can be caused due to the incompressibility of the oil.
The existing solutions are mainly to add an oil-break valve in the system, and the oil-break valve is powered off after the system is stopped to block an oil way between high pressure and low pressure. However, the oil-break valve is not easy to find after being damaged, and is easy to break. There is therefore a need for a safe and reliable anti-hydraulic device.
Disclosure of Invention
The invention aims to design a safe and reliable liquid impact preventing device, which can effectively solve the liquid impact problem of an oil injection single-screw compressor, improve the service performance and prolong the service life of the single-screw compressor.
In order to achieve the purpose, the invention adopts the scheme that a set of liquid impact prevention device is added in the single-screw compressor, the single-screw compressor is arranged in a machine body, between high-pressure cavities and low-pressure cavities, the on-off action between the low-pressure cavities and an oil pool of the high-pressure cavities is achieved through the pressure difference between the high-pressure cavities and the low-pressure cavities, when the pressure difference exists, the high-pressure cavities and the low-pressure cavities are disconnected, and when the pressure difference does not exist, the high-pressure cavities and the low-pressure cavities are communicated.
Scheme one:
A liquid impact preventing device of a single screw compressor includes: baffle (2), screw (3), oil circuit break-make device (4), pore 1 and pore 2.
A pore channel 1 and a pore channel 2 are arranged between a gas high-pressure area and a screw low-pressure area of an oil pool (1) arranged in the compressor shell for communication; the pore channel 1 is directly communicated with a screw low-pressure area, the pore channel 2 is directly communicated with a gas high-pressure area of an oil tank (1) arranged in the compressor shell, a baffle plate (2) is arranged at the pore channel 2 of the gas high-pressure area side wall of the oil tank (1) arranged in the compressor shell, the baffle plate (2) is fixed on the gas high-pressure area side wall of the oil tank (1) arranged in the compressor shell by adopting a screw (3), the baffle plate (2) blocks the pore channel 2, and a channel is reserved at the lower end of the baffle plate (2) so that the pore channel 2 is communicated with the gas high-pressure area of the oil tank (1) arranged in the compressor shell; the side wall around the port of the pore canal 2 is provided with a groove to form a cavity, a spherical oil way on-off device (4) is arranged in the cavity, the diameter of the spherical oil way on-off device (4) is larger than the hole diameter of the pore canal 2, the baffle (2) is used as the limit of the spherical oil way on-off device (4), the spherical oil way on-off device (4) can freely move up and down and left and right in the cavity according to the gas pressure difference between the channel and the pore canal 2, and therefore the pore canal 2 is communicated and disconnected with a gas high-pressure area of an oil pool (1) arranged in a compressor shell.
When the compressor operates, the oil way on-off device (4) seals the pore canal 2 under the action of high-pressure gas, so that no channeling pressure between the high-pressure cavity and the low-pressure cavity is ensured during operation
After the compressor is stopped, the pressure of the left high-pressure cavity and the pressure of the right low-pressure cavity are gradually balanced, the pressures at two sides of the oil way on-off device (4) are balanced, and the oil way on-off device rolls to the limit position of the baffle (2) under the action of gravity, so that the high-pressure cavity and the low-pressure cavity of the compressor are connected, and oil stored in the screw can flow into an oil pool (1) arranged in the compressor shell. The phenomenon of liquid impact during starting is effectively solved;
Scheme II
A liquid impact preventing device of a single screw compressor includes: the device comprises a baffle (2), a screw (3), an oil way on-off device (4), a piston valve (5), a compressible spring (6), a piston valve displacement pore passage (7), a compressible spring pore passage (8), a pore passage 1, a pore passage 2 and a pore passage 3;
A pore channel 1 and a pore channel 2 are arranged between a gas high-pressure area and a screw low-pressure area of an oil pool (1) arranged in the compressor shell for communication; the pore canal 1 is directly communicated with a screw low-pressure area, and the pore canal 2 is directly communicated with a gas high-pressure area of an oil pool (1) arranged in the compressor shell; meanwhile, the screw low-pressure area is communicated with a compressible spring pore canal (8) through a pore canal 3; a piston valve displacement pore canal (7) is arranged on the side wall of a gas high-pressure area of the built-in oil sump (1) of the compressor shell, a piston valve (5) is arranged in the piston valve displacement pore canal (7), one end of the piston valve (5) is directly connected with the gas high-pressure area of the built-in oil sump (1) of the compressor shell, the other end of the piston valve is axially and fixedly connected with a compressible spring (6), the compressible spring (6) is positioned in a compressible spring pore canal (8), and the piston valve displacement pore canal (7) is axially connected with the compressible spring pore canal (8); the piston valve displacement pore canal (7) passes through the pore canal 2; a baffle plate (2) is arranged at a side wall pore passage (2) of a gas high-pressure area of the built-in oil tank (1) of the compressor shell and at a piston valve displacement pore passage (7), the baffle plate (2) is fixed on the side wall of the gas high-pressure area of the built-in oil tank (1) of the compressor shell by adopting a screw (3), and the baffle plate (2) is used as a limiting position of a piston valve (5) and an oil way on-off device (4); a channel is reserved at the lower end of the baffle plate (2) to enable the pore channel (2) to be communicated with a gas high-pressure area of an oil pool (1) arranged in the compressor shell; grooves are formed in the peripheral side walls of the ports of the pore channels 2 to form cavities, spherical oil way on-off devices (4) are arranged in the cavities, the diameter of each spherical oil way on-off device (4) is larger than that of a hole of the pore channel 2, the baffle (2) is used as the limit of each spherical oil way on-off device (4), and the spherical oil way on-off devices (4) can freely move up, down, left and right in the cavities according to the gas pressure difference between the positions of the channels and the inside of the pore channels 2, so that the pore channels 2 are communicated with and disconnected from a gas high-pressure area of an oil pool (1) arranged in a compressor shell;
When the compressor runs, the left side of the piston valve (5) is high-pressure gas, the piston valve (5) and the compressible spring (6) are pressed to the rightmost side, the pore passage 1 is closed, and meanwhile, the oil way on-off device (4) closes the pore passage 2 under the action of the high-pressure gas, so that no channeling pressure between high-pressure and low-pressure cavities is ensured during running;
After the compressor is stopped, the pressure of the left high-pressure cavity and the pressure of the right low-pressure cavity are gradually balanced, as the pore canal 3 is used for communicating the right side of the piston valve (5) with the screw low-pressure area, the pressures at the left side and the right side of the piston valve (5) are balanced, the piston valve is operated to the limit position of the baffle plate (2) under the action of the spring force of the compressible spring (6), the pore canal 1 is communicated with the pore canal 2, the pressures at the two sides of the oil way on-off device (4) are balanced, the pressure rolls to the limit position of the piston baffle plate (2) under the action of gravity, the high-pressure cavity and the low-pressure cavity of the compressor are communicated, and meanwhile, the oil stored in the low-pressure cavity can flow into the built-in oil pool (1) of the compressor shell. The phenomenon of liquid impact during starting is effectively solved;
the pore canal 3 is communicated with the right side of the piston valve (5) and the low pressure area, so that the piston valve is ensured not to be blocked from pressure when in the right side, and the pressure at the two sides of the piston valve (5) is balanced after the stop, so that the compressible spring (6) operates normally;
The baffle (2) limits the piston valve (5) and the oil way on-off device (4);
The pore canal 1 and the pore canal 2 are communicated with the high-pressure cavity and the low-pressure cavity.
The spherical oil way on-off device (4) can be replaced by other oil way on-off devices (4) with any shape, and the other oil way on-off devices (4) with any shape can freely move up and down and left and right in the cavity by the gas pressure difference between the channel and the channel 2, so that the channel 2 can be communicated with and disconnected from a gas high-pressure area of an oil pool (1) arranged in the compressor shell.
Drawings
Fig. 1 is a structural diagram of an embodiment of the invention.
In the figure: 1. the compressor shell is internally provided with an oil pool, 2, a baffle, 3, screws, 4, an oil way on-off device, 9, pore channels 1, 10 and pore channel 2.
Fig. 2 is a diagram showing a second embodiment of the present invention.
In the figure: 1. the compressor shell is internally provided with an oil pool, 2, a baffle, 3, screws, 4, an oil way on-off device, 5, a piston valve, 6, a compressible spring, 7, a piston valve displacement pore passage, 8, a compressible spring pore passage, 9, pore passages 1, 10, pore passages 2, 11 and pore passage 3.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings, but the present invention is not limited to the following examples.
Example 1
Comprising the following steps: the compressor shell is internally provided with an oil pool 1, a baffle plate 2, a screw 3 and an oil way on-off device 4, and the specific view is shown in figure 1.
When the compressor operates, the oil way on-off device 4 seals the pore canal 2 under the action of high-pressure gas, so that no channeling pressure between the high-pressure cavity and the low-pressure cavity is ensured during operation;
after the compressor is stopped, the pressure of the left high-pressure cavity and the pressure of the right low-pressure cavity are balanced gradually, the pressures at two sides of the oil way on-off device 4 are balanced, and the oil way on-off device rolls to the limit position of the baffle plate 2 under the action of gravity, so that the high-pressure cavity and the low-pressure cavity of the compressor are connected, and oil stored in the low-pressure cavity can flow into the built-in oil pool 1 of the compressor shell. The phenomenon of liquid impact during starting is effectively solved;
the baffle 2 limits the oil way on-off device 4;
the pore canal 1 and the pore canal 2 are communicated with the high-pressure cavity and the low-pressure cavity.
Example 2
Comprising the following steps: the compressor shell is internally provided with an oil pool 1, a baffle plate 2, a screw 3, an oil way on-off device 4, a piston valve 5, a spring 6, a piston valve displacement pore canal 7 and a compressible spring pore canal 8, and the concrete is shown in figure 2. When the compressor operates, the left side of the piston valve 5 is high-pressure gas, the piston valve 5 and the compressible spring 6 are pressed to the rightmost side, the pore passage 1 is closed, meanwhile, the oil way on-off device 4 seals the pore passage 2 under the action of the high-pressure gas, the pressure of the left high-pressure cavity and the pressure of the right low-pressure cavity are gradually balanced after the compressor is not in running state after the compressor is stopped under the action of the high-pressure gas, the pore passage 3 is communicated with the right side of the piston valve 5 and the low-pressure cavity, so that the pressure on the left side and the right side of the piston valve 5 is balanced, the piston valve 5 is operated to the limit position of the baffle 2 under the action of the spring force of the spring 6, the pore passage 1 is communicated with the pore passage 2, the pressure on both sides of the oil way on-off device 4 is balanced, and rolls to the limit position of the baffle 2 under the action of gravity, so that the high-pressure cavity of the compressor is connected, and the oil stored in the low-pressure cavity can flow into the built-in oil tank 1 of the compressor shell. The phenomenon of liquid impact during starting is effectively solved;
the pore canal 3 is communicated with the right side of the piston valve 5 and the low-pressure cavity, so that the piston valve is ensured not to be blocked from pressure when the piston valve is right, and the pressure at two sides of the piston valve 5 is balanced after the stop, so that the spring 6 operates normally;
the baffle plate 2 limits the piston valve 5 and the oil way on-off device 4 such as a steel ball;
The pore canal 1 and the pore canal 2 are communicated with the high-pressure cavity and the low-pressure cavity.
Claims (2)
1. A single screw compressor liquid impact prevention device, comprising: baffle (2), screw (3), oil way on-off device (4), piston valve (5), compressible spring (6), piston valve displacement pore canal (7), compressible spring pore canal (8), pore canal 1 (9), pore canal 2 (10), pore canal 3 (11);
A pore passage 1 (9) and a pore passage 2 (10) are arranged between a gas high-pressure area and a screw low-pressure area of an oil pool (1) arranged in the compressor shell for communication; the pore passage 1 (9) is directly communicated with a screw low-pressure area, and the pore passage 2 (10) is directly communicated with a gas high-pressure area of an oil pool (1) arranged in the compressor shell; meanwhile, the screw low-pressure area is communicated with the compressible spring pore canal (8) through the pore canal 3 (11); a piston valve displacement pore canal (7) is arranged on the side wall of a gas high-pressure area of the built-in oil sump (1) of the compressor shell, a piston valve (5) is arranged in the piston valve displacement pore canal (7), one end of the piston valve (5) is directly connected with the gas high-pressure area of the built-in oil sump (1) of the compressor shell, the other end of the piston valve is axially and fixedly connected with a compressible spring (6), the compressible spring (6) is positioned in a compressible spring pore canal (8), and the piston valve displacement pore canal (7) is axially connected with the compressible spring pore canal (8); the piston valve displacement pore canal (7) passes through the pore canal 2 (10); a baffle plate (2) is arranged at a side wall pore passage (2) of a gas high-pressure area of a built-in oil tank (1) of a compressor shell and at a piston valve displacement pore passage (7), the baffle plate (2) is fixed on the side wall of the gas high-pressure area of the built-in oil tank (1) of the compressor shell by adopting a screw (3), and the baffle plate (2) is used as a limiting position of a piston valve (5) and an oil way on-off device (4); a channel is reserved at the lower end of the baffle plate (2) to enable the pore channel (2) to be communicated with a gas high-pressure area of an oil pool (1) arranged in the compressor shell; grooves are formed in the peripheral side walls of the ports of the pore channels 2 (10) to form cavities, spherical oil way on-off devices (4) are arranged in the cavities, the diameter of each spherical oil way on-off device (4) is larger than the diameter of a hole of the pore channel 2 (10), the baffle plate (2) is used as the limit of each spherical oil way on-off device (4), and the spherical oil way on-off devices (4) can freely move up, down, left and right in the cavities according to the gas pressure difference between the positions of the channels and the pore channels 2 (10), so that the pore channels 2 (10) are communicated with and disconnected from a gas high-pressure area of an oil pool (1) arranged in a compressor shell;
When the compressor runs, the left side of the piston valve (5) is high-pressure gas, the piston valve (5) and the compressible spring (6) are pressed to the rightmost side, the pore passage 1 (9) is closed, and meanwhile, the oil way on-off device (4) closes the pore passage 2 (10) under the action of the high-pressure gas, so that no channeling pressure between high-pressure and low-pressure cavities is ensured during running;
After the compressor is stopped, the pressure of the left high-pressure cavity and the pressure of the right low-pressure cavity are gradually balanced, as the pore canal 3 (11) is used for communicating the right side of the piston valve (5) with the screw low-pressure area, the pressures at the left side and the right side of the piston valve (5) are balanced, the piston valve is operated to the limit position of the baffle plate (2) under the action of the spring force of the compressible spring (6), the pore canal 1 (9) is communicated with the pore canal 2 (10), the pressures at the two sides of the oil way on-off device (4) are balanced, the pressure of the oil way on-off device is rolled to the limit position of the piston baffle plate (2) under the action of gravity, the high-pressure cavity and the low-pressure cavity of the compressor are communicated, and meanwhile, the oil accumulated at the screw can flow into the built-in oil pool (1) of the compressor shell.
2. The liquid impact preventing device of the single screw compressor according to claim 1, wherein the spherical oil way on-off device (4) can be replaced by other oil way on-off devices (4) with any shape, and the other oil way on-off devices (4) with any shape can freely move up and down and left and right in the cavity by the pressure difference of gas at the channel and in the pore channel 2 (10), so that the pore channel 2 (10) is communicated with or disconnected from a gas high-pressure area of an oil pool (1) arranged in the compressor shell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810351013.1A CN108386357B (en) | 2018-04-18 | 2018-04-18 | Liquid impact preventing device of single screw compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810351013.1A CN108386357B (en) | 2018-04-18 | 2018-04-18 | Liquid impact preventing device of single screw compressor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108386357A CN108386357A (en) | 2018-08-10 |
| CN108386357B true CN108386357B (en) | 2024-05-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810351013.1A Active CN108386357B (en) | 2018-04-18 | 2018-04-18 | Liquid impact preventing device of single screw compressor |
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| CN (1) | CN108386357B (en) |
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